/* 
   WPS Office Landing Page - Style System 
   Theme: Nebula Deep-Blue & Sunrise Gold
*/

:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary-color: #0ea5e9;
  --accent-color: #f59e0b;
  --accent-hover: #d97706;
  --text-dark: #0f172a;
  --text-medium: #334155;
  --text-light: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #0b1329;
  --bg-card: rgba(255, 255, 255, 0.85);
  --border-color: #e2e8f0;
  --glow-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.15);
  --accent-glow: 0 10px 25px -5px rgba(245, 158, 11, 0.25);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base resets & styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

body {
  overflow-x: hidden;
  line-height: 1.6;
}

/* Grid & Layout Helpers */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Sticky Header & Glassmorphism Navigation */
.header-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition-medium);
  border-bottom: 1px solid transparent;
}

.header-wrapper.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-dark);
  transition: var(--transition-fast);
}

.logo-text-gradient {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2.25rem;
}

.nav-link {
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-medium);
  transition: var(--transition-fast);
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-link:hover {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

.nav-link.active::after {
  width: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--bg-white) !important;
  border-radius: 9999px;
  padding: 0.5rem 1.25rem !important;
  font-weight: 600 !important;
  box-shadow: var(--glow-shadow);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 25px -5px rgba(37, 99, 235, 0.3);
}

.nav-cta::after {
  display: none !important;
}

/* Mobile Menu Toggle Button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-dark);
}

/* Hero Section Base */
.hero-section {
  position: relative;
  overflow: hidden;
  padding: 7rem 0 6rem 0;
  background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.08) 0%, rgba(14, 165, 233, 0.03) 50%, transparent 100%),
              radial-gradient(circle at 10% 80%, rgba(245, 158, 11, 0.04) 0%, transparent 40%);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(37, 99, 235, 0.07);
  border: 1px solid rgba(37, 99, 235, 0.15);
  color: var(--primary-color);
  padding: 0.35rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
}

.title-gradient {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 60%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-medium);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--bg-white);
  box-shadow: var(--glow-shadow);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px -5px rgba(37, 99, 235, 0.35);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-color), #f59e0b);
  color: var(--bg-white);
  box-shadow: var(--accent-glow);
}

.btn-accent:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px -5px rgba(245, 158, 11, 0.45);
}

.btn-secondary {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  color: var(--text-medium);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-light);
  border-color: var(--text-light);
  transform: translateY(-2px);
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.hero-illustration {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual-box {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(14, 165, 233, 0.05) 100%);
  border-radius: 2rem;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.hero-img-placeholder {
  width: 100%;
  height: auto;
  border-radius: 1.25rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.9);
  display: block;
}

/* Float Glow Effect */
.glow-spot {
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: var(--primary-color);
  filter: blur(120px);
  opacity: 0.15;
  z-index: -1;
  pointer-events: none;
}

.spot-1 { top: 10%; right: 10%; }
.spot-2 { bottom: 10%; left: 5%; }

/* Sections Styling */
.section {
  padding: 6rem 0;
}

.section-bg-light {
  background-color: var(--bg-light);
}

.section-bg-dark {
  background-color: var(--bg-dark);
  color: var(--bg-white);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem auto;
}

.section-tag {
  color: var(--primary-color);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  display: block;
}

.section-bg-dark .section-tag {
  color: var(--secondary-color);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.section-bg-dark .section-title {
  color: var(--bg-white);
}

.section-description {
  font-size: 1.1rem;
  color: var(--text-light);
}

.section-bg-dark .section-description {
  color: #94a3b8;
}

/* Features Highlights Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-white);
  padding: 2.25rem;
  border-radius: 1.25rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  transition: var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
  transition: var(--transition-medium);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 35px -10px rgba(15, 23, 42, 0.08);
}

.feature-card:hover::before {
  height: 100%;
}

.feature-icon-wrapper {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.icon-bg-w { background-color: rgba(239, 68, 68, 0.1); color: #ef4444; }
.icon-bg-s { background-color: rgba(16, 185, 129, 0.1); color: #10b981; }
.icon-bg-p { background-color: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.icon-bg-c { background-color: rgba(37, 99, 235, 0.1); color: #2563eb; }
.icon-bg-pdf { background-color: rgba(220, 38, 38, 0.1); color: #dc2626; }
.icon-bg-tpl { background-color: rgba(139, 92, 246, 0.1); color: #8b5cf6; }

.feature-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}

.feature-card-text {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* Multi-Platform Download Center Grid */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.platform-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 2rem;
  text-align: center;
  transition: var(--transition-medium);
  box-shadow: var(--card-shadow);
}

.platform-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: var(--glow-shadow);
}

.platform-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.25rem auto;
  color: var(--text-medium);
}

.platform-card:hover .platform-icon {
  color: var(--primary-color);
  transform: scale(1.05);
  transition: var(--transition-fast);
}

.platform-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.platform-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.platform-btn {
  width: 100%;
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
}

/* Deep Features Sections */
.deep-features-list {
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

.deep-feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.deep-feature-row.reversed {
  direction: rtl;
}

.deep-feature-row.reversed .deep-feature-content {
  direction: ltr;
}

.deep-feature-row.reversed .deep-feature-graphics {
  direction: ltr;
}

.deep-feature-content {
  max-width: 520px;
}

.deep-feature-label {
  display: inline-flex;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.deep-feature-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 1.25rem;
  line-height: 1.3;
}

.deep-feature-description {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 1.75rem;
}

.deep-feature-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.deep-feature-points li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-medium);
}

.deep-feature-points svg {
  color: #10b981;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.deep-feature-graphics {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(14, 165, 233, 0.05) 100%);
  border-radius: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: var(--card-shadow);
}

.graphic-mockup {
  background: var(--bg-white);
  border-radius: 1rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
  border: 1px solid var(--border-color);
  padding: 1rem;
}

/* User Review Cards */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.review-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 2rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-medium);
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px -5px rgba(15, 23, 42, 0.06);
}

.review-author-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.review-avatar {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--primary-light), rgba(14, 165, 233, 0.15));
  color: var(--primary-color);
  font-weight: 700;
  font-size: 1.15rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-meta h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.author-meta p {
  font-size: 0.8rem;
  color: var(--text-light);
}

.review-rating {
  display: flex;
  gap: 0.15rem;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-medium);
  line-height: 1.6;
}

/* Data Statistics Area */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
}

.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
}

.stat-number {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--bg-white) 30%, rgba(255, 255, 255, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 0.25rem;
}

.stat-desc {
  font-size: 0.8rem;
  color: #64748b;
}

/* Interactive Comparison Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  background: var(--bg-white);
  box-shadow: var(--card-shadow);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}

.comparison-table th {
  background: var(--bg-light);
  padding: 1.25rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  border-bottom: 2px solid var(--border-color);
}

.comparison-table td {
  padding: 1.25rem 1.5rem;
  font-size: 0.95rem;
  color: var(--text-medium);
  border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background: rgba(37, 99, 235, 0.01);
}

.comparison-feature {
  font-weight: 600;
  color: var(--text-dark);
}

.comparison-val-wps {
  font-weight: 600;
  color: var(--primary-color);
  background: rgba(37, 99, 235, 0.02);
}

.badge-comparison {
  display: inline-flex;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-comp-wps {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.badge-comp-ms {
  background-color: rgba(100, 116, 139, 0.1);
  color: #64748b;
}

/* Accordion FAQ Area */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 850px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 0.85rem;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition-medium);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.75rem;
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  transition: var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--bg-light);
  color: var(--primary-color);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  background-color: var(--bg-white);
}

.faq-answer-inner {
  padding: 0 1.75rem 1.5rem 1.75rem;
  font-size: 0.95rem;
  color: var(--text-medium);
  line-height: 1.7;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-answer {
  max-height: 500px; /* arbitrary high number */
}

.faq-item.active .faq-answer-inner {
  border-top-color: var(--border-color);
}

.faq-icon-svg {
  transition: var(--transition-medium);
  flex-shrink: 0;
  color: var(--text-light);
}

.faq-item.active .faq-icon-svg {
  transform: rotate(180deg);
  color: var(--primary-color);
}

/* Timeline (Guides / Steps / Changelogs) */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2rem;
  top: 0.25rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 3px solid var(--primary-color);
  z-index: 10;
}

.timeline-item:hover .timeline-marker {
  transform: scale(1.2);
  background: var(--primary-color);
  transition: var(--transition-fast);
}

.timeline-content {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
}

.timeline-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-light);
  background: var(--bg-light);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--text-medium);
}

.timeline-list {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-medium);
}

.timeline-list li {
  margin-bottom: 0.25rem;
}

/* System Specifications Requirements Matrix */
.spec-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.spec-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 2rem;
  box-shadow: var(--card-shadow);
}

.spec-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 2px solid var(--bg-light);
  padding-bottom: 0.75rem;
}

.spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
}

.spec-name {
  color: var(--text-light);
  font-weight: 500;
}

.spec-val {
  color: var(--text-dark);
  font-weight: 600;
}

/* Safe Guarantee Guard Badge Banner */
.guarantee-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.01) 100%);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 1.5rem;
  padding: 3rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.guarantee-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.5rem auto;
  color: #10b981;
}

.guarantee-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}

.guarantee-desc {
  font-size: 1rem;
  color: var(--text-medium);
  max-width: 650px;
  margin: 0 auto 1.5rem auto;
}

.guarantee-items {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-medium);
}

.guarantee-item svg {
  color: #10b981;
}

/* SEO Page Styles (zh-cn.html layout) */
.seo-layout-grid {
  display: grid;
  grid-template-columns: 2.2fr 0.8fr;
  gap: 3rem;
}

.seo-article {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  padding: 3rem;
  box-shadow: var(--card-shadow);
}

.seo-h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 1rem;
  line-height: 1.25;
}

.seo-meta-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.seo-p {
  font-size: 1.05rem;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.seo-h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.seo-h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.seo-bullet-list {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  font-size: 1.05rem;
  color: var(--text-medium);
  line-height: 1.8;
}

.seo-bullet-list li {
  margin-bottom: 0.5rem;
}

.seo-blockquote {
  border-left: 4px solid var(--primary-color);
  background-color: var(--bg-light);
  padding: 1.25rem 1.75rem;
  margin: 1.5rem 0;
  border-radius: 0 0.75rem 0.75rem 0;
}

.seo-blockquote p {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-medium);
  margin: 0;
}

/* Sidebar elements */
.seo-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 1.75rem;
  box-shadow: var(--card-shadow);
}

.widget-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--bg-light);
}

.widget-tips {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.widget-tip-item {
  display: flex;
  gap: 0.75rem;
}

.widget-tip-num {
  width: 1.5rem;
  height: 1.5rem;
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.widget-tip-content h5 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.widget-tip-content p {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Environment Checker widget */
.env-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.env-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-color);
}

.env-item:last-child {
  border-bottom: none;
}

.env-lbl {
  color: var(--text-light);
  font-weight: 500;
}

.env-val {
  font-weight: 600;
}

.env-val.success {
  color: #10b981;
}

/* Sidebar Call to Action Box */
.sidebar-cta {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1e1b4b 100%);
  color: var(--bg-white);
  border-radius: 1.25rem;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 10px 30px rgba(11, 19, 41, 0.15);
}

.sidebar-cta h4 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.sidebar-cta p {
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 1.5rem;
}

.sidebar-cta-btn {
  width: 100%;
}

/* Bottom CTA Widget Banner */
.bottom-cta-banner {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--bg-white);
  border-radius: 1.5rem;
  padding: 4rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--glow-shadow);
}

.bottom-cta-content {
  position: relative;
  z-index: 10;
  max-width: 650px;
  margin: 0 auto;
}

.bottom-cta-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.bottom-cta-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}

.bottom-cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Unified Footer */
.footer-wrapper {
  background-color: var(--bg-dark);
  color: #94a3b8;
  padding: 4rem 0 3rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--bg-white);
  text-decoration: none;
}

.footer-links-group h4 {
  color: var(--bg-white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-list a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--bg-white);
}

.footer-guarantees {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-guarantee-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.footer-guarantee-item svg {
  color: #10b981;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-verification {
  color: #10b981;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.footer-copyright {
  font-size: 0.8rem;
  color: #64748b;
  line-height: 1.7;
}

/* Animations */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Responsive Overrides */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 4rem;
    text-align: center;
  }
  
  .hero-badge {
    margin: 0 auto 1.5rem auto;
  }
  
  .hero-description {
    margin: 0 auto 2.5rem auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-meta {
    justify-content: center;
  }
  
  .hero-illustration {
    order: -1;
  }
  
  .deep-feature-row {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .deep-feature-row.reversed {
    direction: ltr;
  }
  
  .deep-feature-content {
    max-width: 100%;
    text-align: center;
  }
  
  .deep-feature-points {
    align-items: center;
  }
  
  .seo-layout-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.75rem;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 4.5rem;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    flex-direction: column;
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    gap: 1.5rem;
    display: none;
    z-index: 999;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .section {
    padding: 4rem 0;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .guarantee-banner {
    padding: 2rem 1.5rem;
  }
  
  .seo-article {
    padding: 1.75rem;
  }
  
  .timeline {
    padding-left: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.25rem;
  }
  
  .btn {
    width: 100%;
  }
  
  .hero-meta {
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
  }
}